Would this work on our A210, or can someone modify the patch to work on our device

The good news is that the developer of the Funtouch OS ROM for Canvas Magnus A117, who also posted the patch for proximity sensor fix says that the same patch can be used for our Canvas 4. See the below post

XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality.Are you a developer?